Add EDT (Eastern Daylight Time (North America)) to your list and use my-locations table to visually convert it's time to another timezone or city time.
Mouse over the colored hour-tiles and glance at the hours selected by the column.

Current time zone for EDT (Eastern Daylight Time (North America)) is EDT, whose offset is GMT-4 from Greenwich Mean Time (GMT).

The IANA timezone identifier for EDT, Eastern Daylight Time (North America) is "EDT"